Home / 900,070.20-1,242,135.48-492,147.72

Finding the Fourth Proportional to 900,070.20, 1,242,135.48 and 492,147.72

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Solution

The fourth proportional to 900,070.20, 1,242,135.48 and 492,147.72 is: 679,184.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,070.20 : 1,242,135.48 = 492,147.72 : x
  2. Step 2: Convert to fraction form
    900,070.20/1,242,135.48 = 492,147.72/x
  3. Step 3: Cross multiply
    900,070.20x = 1,242,135.48 × 492,147.72
  4. Step 4: Simplify right side
    900,070.20x = 611,314,144,413.11
  5. Step 5: Solve for x
    x = 611,314,144,413.11/900,070.20
  6. Step 6: Final answer
    x = 679,184.96

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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.