Finding the Fourth Proportional to 392,997,372.08, 542,326,796.16 and 216,781,509.20
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Solution
The fourth proportional to 392,997,372.08, 542,326,796.16 and 216,781,509.20 is: 299,153,199.75
Step by Step Solution
- Step 1: Write the proportion equation
392,997,372.08 : 542,326,796.16 = 216,781,509.20 : x - Step 2: Convert to fraction form
392,997,372.08/542,326,796.16 = 216,781,509.20/x - Step 3: Cross multiply
392,997,372.08x = 542,326,796.16 × 216,781,509.20 - Step 4: Simplify right side
392,997,372.08x = 117,566,421,351,165,552 - Step 5: Solve for x
x = 117,566,421,351,165,552/392,997,372.08 - Step 6: Final answer
x = 299,153,199.75
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.