Finding the Fourth Proportional to 687,702,993.90, 1,031,554,490.85 and 624,213,509.10
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Solution
The fourth proportional to 687,702,993.90, 1,031,554,490.85 and 624,213,509.10 is: 936,320,263.65
Step by Step Solution
- Step 1: Write the proportion equation
687,702,993.90 : 1,031,554,490.85 = 624,213,509.10 : x - Step 2: Convert to fraction form
687,702,993.90/1,031,554,490.85 = 624,213,509.10/x - Step 3: Cross multiply
687,702,993.90x = 1,031,554,490.85 × 624,213,509.10 - Step 4: Simplify right side
687,702,993.90x = 643,910,248,561,342,336 - Step 5: Solve for x
x = 643,910,248,561,342,336/687,702,993.90 - Step 6: Final answer
x = 936,320,263.65
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.