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Finding the Fourth Proportional to 670,058.15, 924,895.74 and 428,990.00

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Solution

The fourth proportional to 670,058.15, 924,895.74 and 428,990.00 is: 592,144.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,058.15 : 924,895.74 = 428,990.00 : x
  2. Step 2: Convert to fraction form
    670,058.15/924,895.74 = 428,990.00/x
  3. Step 3: Cross multiply
    670,058.15x = 924,895.74 × 428,990.00
  4. Step 4: Simplify right side
    670,058.15x = 396,771,018,878.12
  5. Step 5: Solve for x
    x = 396,771,018,878.12/670,058.15
  6. Step 6: Final answer
    x = 592,144.16

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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.