Home / 918,000.40-1,377,000.60-286,913.20

Finding the Fourth Proportional to 918,000.40, 1,377,000.60 and 286,913.20

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Solution

The fourth proportional to 918,000.40, 1,377,000.60 and 286,913.20 is: 430,369.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,000.40 : 1,377,000.60 = 286,913.20 : x
  2. Step 2: Convert to fraction form
    918,000.40/1,377,000.60 = 286,913.20/x
  3. Step 3: Cross multiply
    918,000.40x = 1,377,000.60 × 286,913.20
  4. Step 4: Simplify right side
    918,000.40x = 395,079,648,547.92
  5. Step 5: Solve for x
    x = 395,079,648,547.92/918,000.40
  6. Step 6: Final answer
    x = 430,369.80

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Similar ratio
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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.