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Finding the Fourth Proportional to 570,430.65, 787,203.63 and 312,303.30

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Solution

The fourth proportional to 570,430.65, 787,203.63 and 312,303.30 is: 430,983.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,430.65 : 787,203.63 = 312,303.30 : x
  2. Step 2: Convert to fraction form
    570,430.65/787,203.63 = 312,303.30/x
  3. Step 3: Cross multiply
    570,430.65x = 787,203.63 × 312,303.30
  4. Step 4: Simplify right side
    570,430.65x = 245,846,291,420.98
  5. Step 5: Solve for x
    x = 245,846,291,420.98/570,430.65
  6. Step 6: Final answer
    x = 430,983.66

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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.