Finding the Fourth Proportional to 772,497,007.20, 1,158,745,510.80 and 688,316,752.80
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Solution
The fourth proportional to 772,497,007.20, 1,158,745,510.80 and 688,316,752.80 is: 1,032,475,129.20
Step by Step Solution
- Step 1: Write the proportion equation
772,497,007.20 : 1,158,745,510.80 = 688,316,752.80 : x - Step 2: Convert to fraction form
772,497,007.20/1,158,745,510.80 = 688,316,752.80/x - Step 3: Cross multiply
772,497,007.20x = 1,158,745,510.80 × 688,316,752.80 - Step 4: Simplify right side
772,497,007.20x = 797,583,947,315,433,216 - Step 5: Solve for x
x = 797,583,947,315,433,216/772,497,007.20 - Step 6: Final answer
x = 1,032,475,129.20
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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.