Finding the Fourth Proportional to 715,904,681.98, 987,834,630.98 and 402,578,386.10
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Solution
The fourth proportional to 715,904,681.98, 987,834,630.98 and 402,578,386.10 is: 555,494,162.12
Step by Step Solution
- Step 1: Write the proportion equation
715,904,681.98 : 987,834,630.98 = 402,578,386.10 : x - Step 2: Convert to fraction form
715,904,681.98/987,834,630.98 = 402,578,386.10/x - Step 3: Cross multiply
715,904,681.98x = 987,834,630.98 × 402,578,386.10 - Step 4: Simplify right side
715,904,681.98x = 397,680,871,473,617,472 - Step 5: Solve for x
x = 397,680,871,473,617,472/715,904,681.98 - Step 6: Final answer
x = 555,494,162.12
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Double scale
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.