Home / 851,385.60-1,275,328.80-430,898.40

Finding the Fourth Proportional to 851,385.60, 1,275,328.80 and 430,898.40

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Solution

The fourth proportional to 851,385.60, 1,275,328.80 and 430,898.40 is: 645,462.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,385.60 : 1,275,328.80 = 430,898.40 : x
  2. Step 2: Convert to fraction form
    851,385.60/1,275,328.80 = 430,898.40/x
  3. Step 3: Cross multiply
    851,385.60x = 1,275,328.80 × 430,898.40
  4. Step 4: Simplify right side
    851,385.60x = 549,537,139,393.92
  5. Step 5: Solve for x
    x = 549,537,139,393.92/851,385.60
  6. Step 6: Final answer
    x = 645,462.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.