Finding the Fourth Proportional to 873,219,314.80, 1,309,828,972.20 and 436,587,389.20
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Solution
The fourth proportional to 873,219,314.80, 1,309,828,972.20 and 436,587,389.20 is: 654,881,083.80
Step by Step Solution
- Step 1: Write the proportion equation
873,219,314.80 : 1,309,828,972.20 = 436,587,389.20 : x - Step 2: Convert to fraction form
873,219,314.80/1,309,828,972.20 = 436,587,389.20/x - Step 3: Cross multiply
873,219,314.80x = 1,309,828,972.20 × 436,587,389.20 - Step 4: Simplify right side
873,219,314.80x = 571,854,811,271,317,376 - Step 5: Solve for x
x = 571,854,811,271,317,376/873,219,314.80 - Step 6: Final answer
x = 654,881,083.80
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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.