Finding the Fourth Proportional to 390,482,862.12, 538,864,871.49 and 214,273,806.30
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Solution
The fourth proportional to 390,482,862.12, 538,864,871.49 and 214,273,806.30 is: 295,697,041.53
Step by Step Solution
- Step 1: Write the proportion equation
390,482,862.12 : 538,864,871.49 = 214,273,806.30 : x - Step 2: Convert to fraction form
390,482,862.12/538,864,871.49 = 214,273,806.30/x - Step 3: Cross multiply
390,482,862.12x = 538,864,871.49 × 214,273,806.30 - Step 4: Simplify right side
390,482,862.12x = 115,464,627,095,522,656 - Step 5: Solve for x
x = 115,464,627,095,522,656/390,482,862.12 - Step 6: Final answer
x = 295,697,041.53
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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.