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Finding the Fourth Proportional to 921,360.12, 1,271,421.03 and 507,878.79

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Solution

The fourth proportional to 921,360.12, 1,271,421.03 and 507,878.79 is: 700,841.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,360.12 : 1,271,421.03 = 507,878.79 : x
  2. Step 2: Convert to fraction form
    921,360.12/1,271,421.03 = 507,878.79/x
  3. Step 3: Cross multiply
    921,360.12x = 1,271,421.03 × 507,878.79
  4. Step 4: Simplify right side
    921,360.12x = 645,727,774,296.95
  5. Step 5: Solve for x
    x = 645,727,774,296.95/921,360.12
  6. Step 6: Final answer
    x = 700,841.90

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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.